Coverage

Years of collection, reference years, and sample sizes

Data regarding diagnoses was first collected between 2002 and 2010; data regarding contacts was first collected between 2006 and 2010. The sample size used was 84 practices and around 350,000 individuals. For both cases, data collection is ongoing and is scheduled to continue at some point in the future (data collected in 2011 should be released in May/June 2013).